HIP6005B
TM
Data Sheet
February 1999
FN4568.2
Buck Pulse-Width Modulator (PWM)
Controller and Output Voltage Monitor
Features
• Drives N-Channel MOSFET
The HIP6005B provides complete control and protection for
a DC-DC converter optimized for high-performance
microprocessor applications. It is designed to drive an
N-Channel MOSFET in a standard buck topology. The
HIP6005B integrates all of the control, output adjustment,
monitoring and protection functions into a single package.
• Operates from +5V or +12V Input
• Simple Single-Loop Control Design
- Voltage-Mode PWM Control
• Fast Transient Response
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Ratio
The output voltage of the converter is easily adjusted and
precisely regulated. The HIP6005B includes a fully
TTL-compatible 5-input digital-to-analog converter (DAC)
• Excellent Output Voltage Regulation
- ±1% Over Line Voltage and Temperature
• TTL-Compatible 5-Bit Digital-to-Analog Output Voltage
Selection
- Wide Range . . . . . . . . . . . . . . . . . . . 1.3V
- 0.1V Binary Steps . . . . . . . . . . . . . . 2.1V
- 0.05V Binary Steps . . . . . . . . . . . . 1.3V
• Power-Good Output Voltage Monitor
that adjusts the output voltage from 1.3V
to 2.05V
in
DC
DC
in 0.1V steps.
DC
0.05V increments and from 2.1V
to 3.5V
DC
to 3.5V
to 3.5V
to 2.05V
DC
DC
DC
DC
DC
The precision reference and voltage-mode regulator hold the
selected output voltage to within ±1% over temperature and
line voltage variations.
DC
The HIP6005B provides simple, single feedback loop, voltage-
mode control with fast transient response. It includes a 200kHz
free-running triangle-wave oscillator that is adjustable from
below 50kHz to over 1MHz. The error amplifier features a
15MHz gain-bandwidth product and 6V/µs slew rate which
enables high converter bandwidth for fast transient
performance. The resulting PWM duty ratio ranges from 0% to
100%.
• Over-Voltage and Over-Current Fault Monitors
- Does Not Require Extra Current Sensing Element,
Uses MOSFET’s r
DS(ON)
• Small Converter Size
- Constant Frequency Operation
- 200kHz Free-Running Oscillator Programmable from
50kHz to over 1MHz
Applications
The HIP6005B monitors the output voltage with a window
comparator that tracks the DAC output and issues a Power
Good signal when the output is within ±10%. The HIP6005B
protects against over-current and over-voltage conditions by
inhibiting PWM operation. Additional built-in over-voltage
protection triggers an external SCR to crowbar the input
supply. The HIP6005B monitors the current by using the
• Power Supply for Pentium®, Pentium Pro, Pentium II,
PowerPC™, K6™, 6X86™ and Alpha™ Microprocessors
•
•
High-Power 5V to 3.xV DC-DC Regulators
Low-Voltage Distributed Power Supplies
Pinout
HIP6005B
(SOIC, TSSOP)
TOP VIEW
r
of the upper MOSFET which eliminates the need for
DS(ON)
a current sensing resistor.
1
2
3
4
5
6
7
8
9
VSEN
OCSET
SS
20 RT
Ordering Information
OVP
19
TEMP.
PKG.
NO.
18 VCC
17 NC
16 NC
15 BOOT
o
PART NUMBER RANGE ( C)
PACKAGE
20 Ld SOIC
20 Ld TSSOP
VID0
HIP6005BCB
HIP6005BCV
0 to 70
0 to 70
M20.3
VID1
VID2
M20.173
VID3
UGATE
PHASE
PGOOD
14
NOTE: When ordering, use the entire part number. Add the suffix T
to obtain the TSSOP variant in tape and reel, e.g., HIP6005BCV-T.
VID4
13
12
COMP
FB 10
11 GND
6X86™ is a trademark of Cyrix Corporation.
Alpha Micro™ is a trademark of Digital Computer Equipment Corporation
K6™ is a trademark of Advanced Micro Devices.
Pentium® is a registered trademark of Intel Corporation.
PowerPC™ is a registered trademark of IBM.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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110